The purpose of this study is to examine the development of Korean language learners by analyzing the processes of change in using the discourse markers in speaking. For this study we have collected 66 Korean learners’ speaking materials from level 2 to level 6. To see if there are some differences between advanced students and intermediate students when they are using discourse markers in debate speaking tasks, we analyzed the usage rate and type of discourse markers. The result of this study are as follows: First, students with different language levels are using similar discourse skills in debate tasks. Second, the advanced and intermediate students are using more discourse markers in speaking than the beginners. Last but not least, even the advanced students are using same kind of discourse markers repeatedly. (Yonsei University)